Question

What is the solution of the system? Use any method.

x = –2y + 10
–6y = 6x – 6


a. x = 9, y = –8


b. x = –8, y = 114


c. x = –8, y = 9


d. x = 114, y = 9

Answer 1

x+2y=10
6x+6y=6 -> x+y=1
(x+2y=10)-(x+y=1)=y=9
x+(2*9)=10
x+18=10
x=-8 and y=9 -> c